5-Hydroxytryptophan (5-HTP) is an amino acid that is the intermediate step between tryptophan and the important brain chemical serotonin. There is a massive amount of evidence that suggests that low serotonin levels are a common consequence of modern living. The lifestyle and dietary practices of many people living in this stress filled era results in lowered levels of serotonin within the brain. As a result, many people are overweight, crave sugar and other carbohydrates, experience bouts of depression, get frequent headaches, and have vague muscle aches and pain. All of these maladies are correctable by raising brain serotonin levels. For more detailed technical information please request our technical booklet. This supplement contains 5HTP in a bio-effective form, comprising the natural shrub Griffonia Simplicifolia 5-HTP is the safe precursor to serotonin - This supplement also contains the other nutrients necessary for the conversion of 5-HTP to serotonin including Magnesium & Vitamin B6 Easy-to-swallow gluten-free capsules This supplement is suitable for Men, Women and the Elderly Yeast free and suitable for vegetarians, vegans and for people with Candida and Yeast sensitivities Free from Genetically Modified Substances